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  2. Supersilver ratio - Wikipedia

    en.wikipedia.org/wiki/Supersilver_ratio

    The 14 odd composite numbers below 10 8 to pass the test are n = 3 2, 5 2, 5 3, 315, 99297, 222443, 418625, 9122185, 3257 2, 11889745, 20909625, 24299681, 64036831, 76917325. [10] The Pilgrim: a supersilver Rauzy fractal of type a ↦ aba. The three subtiles have areas in ratio ς.

  3. Harmonic series (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Harmonic_series_(mathematics)

    Calculus. In mathematics, the harmonic series is the infinite series formed by summing all positive unit fractions : The first terms of the series sum to approximately , where is the natural logarithm and is the Euler–Mascheroni constant. Because the logarithm has arbitrarily large values, the harmonic series does not have a finite limit: it ...

  4. Packing problems - Wikipedia

    en.wikipedia.org/wiki/Packing_problems

    An a × b rectangle can be packed with 1 × n strips if and only if n divides a or n divides b. [ 15 ] [ 16 ] de Bruijn's theorem : A box can be packed with a harmonic brick a × a b × a b c if the box has dimensions a p × a b q × a b c r for some natural numbers p , q , r (i.e., the box is a multiple of the brick.) [ 15 ]

  5. Fraction - Wikipedia

    en.wikipedia.org/wiki/Fraction

    A simple fraction (also known as a common fraction or vulgar fraction, where vulgar is Latin for "common") is a rational number written as a / b or ⁠ ⁠, where a and b are both integers. [ 9] As with other fractions, the denominator ( b) cannot be zero. Examples include ⁠ 1 2 ⁠, − ⁠ 8 5 ⁠, ⁠ −8 5 ⁠, and ⁠ 8 −5 ⁠.

  6. Plastic ratio - Wikipedia

    en.wikipedia.org/wiki/Plastic_ratio

    The internal, coincident short edge of the medium rectangle and long edge of the small rectangle divides one of the square's other, two edges into two segments that stand to one another in the ratio ρ 4. The fact that a rectangle of aspect ratio ρ 2 can be used for dissections of a square into similar rectangles is equivalent to an algebraic ...

  7. Supergolden ratio - Wikipedia

    en.wikipedia.org/wiki/Supergolden_ratio

    In mathematics, the supergolden ratio is a geometrical proportion close to 85/58.Its true value is the real solution of the equation x 3 = x 2 + 1.. The name supergolden ratio results from analogy with the golden ratio, the positive solution of the equation x 2 = x + 1.

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